Some states are gonna be brutalized and some left alone and some in between.
If I was a betting man I'd say you are gonna be left alone.
I hope so, and maybe the state won't be so strict, but I'm not sure about our local Postal Nazi. Way back, many moons ago, Rich and I used to order cigarettes from a reservation in NY. The federal cigarette taxes had been paid on them, but there was no state tax. They shipped them through the mail, and the Postal Nazi turned us in to the state Dept. of Revenue. We got a bill for "use tax" for all the cartons of cigarettes that had gone through the post office. She freaking KEPT TRACK OF THEM. Use tax is what SD charges on anything they missed charging sales tax on. After all, you're going to USE it in SD, so it makes no difference where you bought it. You're gonna pay the damn use tax or else. Now, admittedly, this was for cigarettes, which definitely ARE a tobacco product, but once August rolls around and e-cigs are officially considered "tobacco," she'll be gunning for stuff like that.
I'd just rather be safe than sorry.